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For the district, see Amphoe U Thong.
For the style of Buddha iconography, see U Thong Style.
Ramathibodi I
รามาธิบดีที่ 1
King of Ayutthaya kingdom
Royal Statue of King Ramathibodi I in Amphoe U Thong, Suphanburi province, Thailand
King of Siam
Reign 1350–1369
Successor Ramesuan
Born 10 March 1314
Died 1369
Issue Ramesuan
Full name
Ramathibodi I
Dynasty Uthong Dynasty

U-thong[1] (Thai: อู่ทอง) or Ramathibodi I (Thai: รามาธิบดีที่ 1) (1314–1369) was the first king of the kingdom Ayutthaya (now part of Thailand),[2]:222 reigning from 1350 to 1369. He was known as Prince U Thong (meaning "Golden Cradle") before he ascended to the throne in 1350. He was thought to have been a descendant of Mangrai.[3]:27

Ramathibodi I established four Great Officers of State. These were the Ministry of the Interior (Wieng), the Minitry of the Treasury (Klang), the Ministry for the King's Household (Wang), and the Ministry of Agriculture (Na). He also codified the T'ai laws. Finally, he formed an alliance with the Ming Dynasty.[3]:28

He established his own capital in the new city of Ayutthaya. King Ramathabodi's reign included Korat, Chantaburi, Tavoy, Tenasserim, and large parts of Malaya.[3]:28

According to a better-known source, a seventeenth-century account by Dutchman Jeremias Van Vliet, a Renowned Legend stated that Ramatibodi was an ethnic Chinese, having sailed down from China. After succeeding in trade, he became influential enough to rule the city of Phetchaburi, a coastal town of the Gulf of Thailand, before travelling up to Ayutthaya.

In 1352 he laid siege to Yasodharapura. He was successful the following year and placed one of his sons on the throne. However, they were only able to keep the throne until 1357, when the Khmers were able to regain it.[2]:236

King Ramathibodi's death sparked a conflict over succession. Initially, his son King Ramesuan became ruler of Ayutthaya, but King Ramesuan later abdicated in favor of King Ramathibodi's brother-in-law, King Borommaracha I. This rivalry for the throne may have been peaceful or it may have been bloody.[3]:29


  1. ^ The Royal Institute. List of monarchs Ayutthaya. (Thai)
  2. ^ a b Coedès, George (1968). Walter F. Vella, ed. The Indianized States of Southeast Asia. trans.Susan Brown Cowing. University of Hawaii Press. ISBN 978-0-8248-0368-1.  Cite error: Invalid <ref> tag; name "Coedes" defined multiple times with different content (see the help page).
  3. ^ a b c d Chakrabongse, C., 1960, Lords of Life, London: Alvin Redman Limited
  • Wyatt, David K., Thailand: A Short History, New Haven (Yale University), 2003. ISBN 0-300-08475-7
  • Srisak Vallipodom, Sheikh Ahmad Qomi and the History of Siam, Cultural Center of the Islamic City, Republic of Iran, Bangkok 1995, page 209
  • Plubplung Kongchana, The Persians in Ayutthaya, Institute of Asia Pacific Studies, Srinakharinwirot University.

See also[edit]

Born: 1314 Died: 1369
Regnal titles
Preceded by
King of Ayutthaya
Succeeded by